摘要:
A process for preparing fluorocarbon fluoroalkanesulfonates comprises (a) forming a mixture comprising at least one fluoroalkanesulfonyl halide, e.g., perfluoromethanesulfonyl fluoride, at least one fluorocarbon-substituted carbinol, e.g., 1,1-dihydroperfluorobutoxyethoxyethanol, and at least one base, e.g., triethyl amine; and (b) allowing the mixture to react in the absence of solvent at a temperature below ambient. The process is volume-efficient and provides high yields of fluorocarbon fluoroalkanesulfonates useful as intermediates in, e.g., drug synthesis.
摘要:
A continuous process for preparing in a Simons electrochemical cell charged with anhydrous liquid HF and a S- and H-containing organic precursor fluorochemical compounds having the formula F.sub.5 S--R.sub.f --X where X is COF or SO.sub.2 F; R.sub.f is a saturated fluoroaliphatic radical having at least 3 fully-fluorinated C atoms; and the F.sub.5 S group is bonded via a S--C bond to 1 of the 3 fully-fluorinated C atoms of the R.sub.f radical.
摘要:
Polymer optical core fiber made from homopolymers of 1,1-dihydroperfluorocyclohexylmethyl methacrylate and co-polymers thereof with other .beta.-fluorinated (meth)acrylates and polymethyl methacrylate are disclosed that have low optical loss.
摘要:
Perfluoropolycycloalkanes are provided. These perfluoropolycycloalkanes are ring assemblies having (a) at least two perfluorinated cyclohexane rings, (b) at least two perfluorinated fused ring systems, or (c) combinations of at least one perfluorinated cyclohexane ring with at least one perfluorinated fused ring system, each perfluorinated ring or fused ring system being directly joined to another perfluorinated ring or ring system by a single bond and the ring assemblies having a total of at least 13 carbon atoms.
摘要:
An optical material includes an adhesive formed from perfluoroalkylsulfonamidoethyl acrylate, aliphatic urethane acrylate oligomer and acrylate monomer. A film can include a first layer, a second layer disposed on the first layer and a polymerized composition disposed between the first and second layers and attaching the first layer to the second layer, the composition including perfluoroalkylsulfonamidoethyl acrylate, aliphatic urethane acrylate oligomer and acrylate monomer. A film can include a substrate and a plurality of structures disposed on the substrate, each of the structures formed by polymerizing a composition including perfluoroalkylsulfonamidoethyl acrylate, aliphatic urethane acrylate oligomer and acrylate monomer.
摘要:
Novel aqueous, acid etch solutions comprising a fluorinated surfactant are provided. The etch solutions are used with a wide variety of substrates, for example, in the etching of silicon oxide-containing substrates.
摘要:
A composition having at least about 10 percent perfluoroalkylsulfonamideoethyl acrylate; at least about 5 percent aliphatic urethane acrylate oligomer; at least about 1 percent acrylate monomer; and less than about 84 percent other reactive and non-reactive components. The composition, with the addiction of a light absorbing pigment, is particularly useful as a light absorbing adhesive in an optical element such as a rear projection screen that incorporates totally internally reflecting structures to disperse the light passing through the screen.
摘要:
Described are fluorochemical surfactants derived from nonafluorobutanesulfonyl fluoride that contain polyalkyleneoxy side chains and may be copolymerized with acrylic acid or methacrylic acid to form polyacrylates or polymethacrylates. The surfactants surprisingly lower the surface tension of water and other liquids in the same or similar low values achieved by premier surfactants such as those derived from perfluorooctane sulfonyl fluoride.
摘要:
A process for preparing a fluoride from its corresponding alcohol comprises the steps of (a) forming a mixture comprising (i) at least one fluorinated, saturated aliphatic or alicyclic sulfonyl fluoride (for example, perfluorobutanesulfonyl fluoride) and (ii) at least one primary or secondary alcohol; and (b) adding a molar excess of at least one strong, aprotic, non-nucleophilic, hindered, double bond-containing, organic base (for example, 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)) to the mixture.
摘要:
Fluorine-containing, chiral liquid crystal compounds comprise (a) a chiral fluorochemical terminal portion containing at least one methylene group and optionally containing at least one catenary ether oxygen atom; (b) a saturated, chiral or achiral, hydrocarbon terminal portion; and (c) a central core connecting the terminal portions. The compounds have smectic mesophases or latent smectic mesophases and are useful, for example, in liquid crystal display devices.